Glass is an amorphous solid – meaning it has no crystal structure. A liquid is amorphous because it can mix, but that does not mean glass is a liquid – at most it is LIKE a liquid.
I blow glass and have watched pieces shatter when dropped when they are at 900F degrees when it is putty like at 1300F. If it is stiff enough to shatter at 900F there is no way it will flow at 90F.
If glass could flow over time, then all the thin glass goblets from 500-1000 years ago would be puddles on shelves of museum and Roman glass from 1800 years ago would be misshapen and it is not.
Before glass was machine made, it was made by spinning crowns of glass (disks) or blowing cylinders. Crown glass is thicker toward the center so pane of glass cut from it are thicker on one edge. It turns out that putting thicker at the bottom is more pleasing to the eye than other ways.
I think you want the word “exhibit” rather than “inhibit”http://users.ticnet.com/mikefirth/winlig…http://users.ticnet.com/mikefirth/glassa…
And by the way, a super-cooled liquid is one that has been cooled below its freezing point and is still liquid, not a solid liquid – whoever first misused that term should be chastised severely. Water can be super cooled down to 28F. If a bit of ice is dropped in, the whole mass crystallizes instantly, becoming solid.

FuzzyFerreton November 30th, -0001

glass is actually a liquid its just very thick you will find over long periods of time it will bend, seems weird but that’s how it is

ToxicSkullon November 30th, -0001

Glass is a liquid. Thus, it flows, just very very slowly. That means it will be thicker at the bottom, if mounted vertically, over a long period of time. After enough time has passed, the glass wont even be in the window anymore, it will have spilled downwards, just like spilling any other liquid. Just in extreme slow motion.

Styleon November 30th, -0001

Glass is not a liquid! Urban legend alert. But it is an amorphous solid. Glass will not take the shape of what you put it in no matter how long you wait.

WyleCoyoteon November 30th, -0001

I agree with the previous folks. glass is a “super cooled liquid” and over time in a vertical plane will become thicker at the bottom and thinner at the top. gavity does that and of course the world sucks! lol, just had to theow that in…..

SkateRForeveRon November 30th, -0001

As a previous answerer said, glass is not a liquid, but is actually an amorphous solid. Over very long periods of time, glass will actually flow, which will explain why 100-year-old glass is thicker on the bottom than it is on top. The flow is a property of amorphous solids.

Fractalfallouton November 30th, -0001

Glass will flow and get thicker at the bottom over a long period of time. There is evidence that marble and even concrete exhibit this same tendency.

ontheplainson November 30th, -0001

Glass is not in any way a liquid. Only some glasses are called a super cooled liquid, and it only means they were formed by cooling a liquid quickly not that they still are liquid. There is old glass which is hung horizontal yet it doesn’t sag in the middle and the only reason glass is thicker at on end than the other in old glass was because of how they made that glass. Its thickness changes throughout the glass so its often even thicker somewhere in the middle than at the base.

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ALES LOMBERGAR is one of the few artisans in Europe who still practice the ancient art of glass acid etching which flourished in the late 19th century. Decorations are applied with resin resists by hand and then exposed to acid baths, with no machinery used. More information here.